1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include <readline/readline.h>
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
65 /* Some HP-UX related globals to clear when a new "main"
66 symbol file is loaded. HP-specific. */
68 extern int hp_som_som_object_present
;
69 extern int hp_cxx_exception_support_initialized
;
70 #define RESET_HP_UX_GLOBALS() do {\
71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
76 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
77 void (*show_load_progress
) (const char *section
,
78 unsigned long section_sent
,
79 unsigned long section_size
,
80 unsigned long total_sent
,
81 unsigned long total_size
);
82 void (*pre_add_symbol_hook
) (char *);
83 void (*post_add_symbol_hook
) (void);
84 void (*target_new_objfile_hook
) (struct objfile
*);
86 static void clear_symtab_users_cleanup (void *ignore
);
88 /* Global variables owned by this file */
89 int readnow_symbol_files
; /* Read full symbols immediately */
91 /* External variables and functions referenced. */
93 extern void report_transfer_performance (unsigned long, time_t, time_t);
95 /* Functions this file defines */
98 static int simple_read_overlay_region_table (void);
99 static void simple_free_overlay_region_table (void);
102 static void set_initial_language (void);
104 static void load_command (char *, int);
106 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
108 static void add_symbol_file_command (char *, int);
110 static void add_shared_symbol_files_command (char *, int);
112 static void reread_separate_symbols (struct objfile
*objfile
);
114 static void cashier_psymtab (struct partial_symtab
*);
116 bfd
*symfile_bfd_open (char *);
118 int get_section_index (struct objfile
*, char *);
120 static void find_sym_fns (struct objfile
*);
122 static void decrement_reading_symtab (void *);
124 static void overlay_invalidate_all (void);
126 static int overlay_is_mapped (struct obj_section
*);
128 void list_overlays_command (char *, int);
130 void map_overlay_command (char *, int);
132 void unmap_overlay_command (char *, int);
134 static void overlay_auto_command (char *, int);
136 static void overlay_manual_command (char *, int);
138 static void overlay_off_command (char *, int);
140 static void overlay_load_command (char *, int);
142 static void overlay_command (char *, int);
144 static void simple_free_overlay_table (void);
146 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
148 static int simple_read_overlay_table (void);
150 static int simple_overlay_update_1 (struct obj_section
*);
152 static void add_filename_language (char *ext
, enum language lang
);
154 static void set_ext_lang_command (char *args
, int from_tty
);
156 static void info_ext_lang_command (char *args
, int from_tty
);
158 static char *find_separate_debug_file (struct objfile
*objfile
);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns
*symtab_fns
= NULL
;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
176 int symbol_reloading
= 0;
179 /* If non-zero, shared library symbols will be added automatically
180 when the inferior is created, new libraries are loaded, or when
181 attaching to the inferior. This is almost always what users will
182 want to have happen; but for very large programs, the startup time
183 will be excessive, and so if this is a problem, the user can clear
184 this flag and then add the shared library symbols as needed. Note
185 that there is a potential for confusion, since if the shared
186 library symbols are not loaded, commands like "info fun" will *not*
187 report all the functions that are actually present. */
189 int auto_solib_add
= 1;
191 /* For systems that support it, a threshold size in megabytes. If
192 automatically adding a new library's symbol table to those already
193 known to the debugger would cause the total shared library symbol
194 size to exceed this threshhold, then the shlib's symbols are not
195 added. The threshold is ignored if the user explicitly asks for a
196 shlib to be added, such as when using the "sharedlibrary"
199 int auto_solib_limit
;
202 /* Since this function is called from within qsort, in an ANSI environment
203 it must conform to the prototype for qsort, which specifies that the
204 comparison function takes two "void *" pointers. */
207 compare_symbols (const void *s1p
, const void *s2p
)
209 struct symbol
**s1
, **s2
;
211 s1
= (struct symbol
**) s1p
;
212 s2
= (struct symbol
**) s2p
;
213 return (strcmp (SYMBOL_NATURAL_NAME (*s1
), SYMBOL_NATURAL_NAME (*s2
)));
216 /* This compares two partial symbols by names, using strcmp_iw_ordered
217 for the comparison. */
220 compare_psymbols (const void *s1p
, const void *s2p
)
222 struct partial_symbol
*const *s1
= s1p
;
223 struct partial_symbol
*const *s2
= s2p
;
225 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1
),
226 SYMBOL_NATURAL_NAME (*s2
));
230 sort_pst_symbols (struct partial_symtab
*pst
)
232 /* Sort the global list; don't sort the static list */
234 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
235 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
239 /* Make a null terminated copy of the string at PTR with SIZE characters in
240 the obstack pointed to by OBSTACKP . Returns the address of the copy.
241 Note that the string at PTR does not have to be null terminated, I.E. it
242 may be part of a larger string and we are only saving a substring. */
245 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
247 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
248 /* Open-coded memcpy--saves function call time. These strings are usually
249 short. FIXME: Is this really still true with a compiler that can
252 const char *p1
= ptr
;
254 const char *end
= ptr
+ size
;
262 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
263 in the obstack pointed to by OBSTACKP. */
266 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
269 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
270 char *val
= (char *) obstack_alloc (obstackp
, len
);
277 /* True if we are nested inside psymtab_to_symtab. */
279 int currently_reading_symtab
= 0;
282 decrement_reading_symtab (void *dummy
)
284 currently_reading_symtab
--;
287 /* Get the symbol table that corresponds to a partial_symtab.
288 This is fast after the first time you do it. In fact, there
289 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
293 psymtab_to_symtab (struct partial_symtab
*pst
)
295 /* If it's been looked up before, return it. */
299 /* If it has not yet been read in, read it. */
302 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
303 currently_reading_symtab
++;
304 (*pst
->read_symtab
) (pst
);
305 do_cleanups (back_to
);
311 /* Initialize entry point information for this objfile. */
314 init_entry_point_info (struct objfile
*objfile
)
316 /* Save startup file's range of PC addresses to help blockframe.c
317 decide where the bottom of the stack is. */
319 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
321 /* Executable file -- record its entry point so we'll recognize
322 the startup file because it contains the entry point. */
323 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
327 /* Examination of non-executable.o files. Short-circuit this stuff. */
328 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
330 objfile
->ei
.deprecated_entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
331 objfile
->ei
.deprecated_entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
332 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
333 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
334 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
335 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
338 /* Get current entry point address. */
341 entry_point_address (void)
343 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
346 /* Remember the lowest-addressed loadable section we've seen.
347 This function is called via bfd_map_over_sections.
349 In case of equal vmas, the section with the largest size becomes the
350 lowest-addressed loadable section.
352 If the vmas and sizes are equal, the last section is considered the
353 lowest-addressed loadable section. */
356 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
358 asection
**lowest
= (asection
**) obj
;
360 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
363 *lowest
= sect
; /* First loadable section */
364 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
365 *lowest
= sect
; /* A lower loadable section */
366 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
367 && (bfd_section_size (abfd
, (*lowest
))
368 <= bfd_section_size (abfd
, sect
)))
372 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
374 struct section_addr_info
*
375 alloc_section_addr_info (size_t num_sections
)
377 struct section_addr_info
*sap
;
380 size
= (sizeof (struct section_addr_info
)
381 + sizeof (struct other_sections
) * (num_sections
- 1));
382 sap
= (struct section_addr_info
*) xmalloc (size
);
383 memset (sap
, 0, size
);
384 sap
->num_sections
= num_sections
;
389 /* Build (allocate and populate) a section_addr_info struct from
390 an existing section table. */
392 extern struct section_addr_info
*
393 build_section_addr_info_from_section_table (const struct section_table
*start
,
394 const struct section_table
*end
)
396 struct section_addr_info
*sap
;
397 const struct section_table
*stp
;
400 sap
= alloc_section_addr_info (end
- start
);
402 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
404 if (bfd_get_section_flags (stp
->bfd
,
405 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
406 && oidx
< end
- start
)
408 sap
->other
[oidx
].addr
= stp
->addr
;
409 sap
->other
[oidx
].name
410 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
411 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
420 /* Free all memory allocated by build_section_addr_info_from_section_table. */
423 free_section_addr_info (struct section_addr_info
*sap
)
427 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
428 if (sap
->other
[idx
].name
)
429 xfree (sap
->other
[idx
].name
);
434 /* Initialize OBJFILE's sect_index_* members. */
436 init_objfile_sect_indices (struct objfile
*objfile
)
441 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
443 objfile
->sect_index_text
= sect
->index
;
445 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
447 objfile
->sect_index_data
= sect
->index
;
449 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
451 objfile
->sect_index_bss
= sect
->index
;
453 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
455 objfile
->sect_index_rodata
= sect
->index
;
457 /* This is where things get really weird... We MUST have valid
458 indices for the various sect_index_* members or gdb will abort.
459 So if for example, there is no ".text" section, we have to
460 accomodate that. Except when explicitly adding symbol files at
461 some address, section_offsets contains nothing but zeros, so it
462 doesn't matter which slot in section_offsets the individual
463 sect_index_* members index into. So if they are all zero, it is
464 safe to just point all the currently uninitialized indices to the
467 for (i
= 0; i
< objfile
->num_sections
; i
++)
469 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
474 if (i
== objfile
->num_sections
)
476 if (objfile
->sect_index_text
== -1)
477 objfile
->sect_index_text
= 0;
478 if (objfile
->sect_index_data
== -1)
479 objfile
->sect_index_data
= 0;
480 if (objfile
->sect_index_bss
== -1)
481 objfile
->sect_index_bss
= 0;
482 if (objfile
->sect_index_rodata
== -1)
483 objfile
->sect_index_rodata
= 0;
488 /* Parse the user's idea of an offset for dynamic linking, into our idea
489 of how to represent it for fast symbol reading. This is the default
490 version of the sym_fns.sym_offsets function for symbol readers that
491 don't need to do anything special. It allocates a section_offsets table
492 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
495 default_symfile_offsets (struct objfile
*objfile
,
496 struct section_addr_info
*addrs
)
500 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
501 objfile
->section_offsets
= (struct section_offsets
*)
502 obstack_alloc (&objfile
->psymbol_obstack
,
503 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
504 memset (objfile
->section_offsets
, 0,
505 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
507 /* Now calculate offsets for section that were specified by the
509 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
511 struct other_sections
*osp
;
513 osp
= &addrs
->other
[i
] ;
517 /* Record all sections in offsets */
518 /* The section_offsets in the objfile are here filled in using
520 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
523 /* Remember the bfd indexes for the .text, .data, .bss and
525 init_objfile_sect_indices (objfile
);
529 /* Process a symbol file, as either the main file or as a dynamically
532 OBJFILE is where the symbols are to be read from.
534 ADDRS is the list of section load addresses. If the user has given
535 an 'add-symbol-file' command, then this is the list of offsets and
536 addresses he or she provided as arguments to the command; or, if
537 we're handling a shared library, these are the actual addresses the
538 sections are loaded at, according to the inferior's dynamic linker
539 (as gleaned by GDB's shared library code). We convert each address
540 into an offset from the section VMA's as it appears in the object
541 file, and then call the file's sym_offsets function to convert this
542 into a format-specific offset table --- a `struct section_offsets'.
543 If ADDRS is non-zero, OFFSETS must be zero.
545 OFFSETS is a table of section offsets already in the right
546 format-specific representation. NUM_OFFSETS is the number of
547 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
548 assume this is the proper table the call to sym_offsets described
549 above would produce. Instead of calling sym_offsets, we just dump
550 it right into objfile->section_offsets. (When we're re-reading
551 symbols from an objfile, we don't have the original load address
552 list any more; all we have is the section offset table.) If
553 OFFSETS is non-zero, ADDRS must be zero.
555 MAINLINE is nonzero if this is the main symbol file, or zero if
556 it's an extra symbol file such as dynamically loaded code.
558 VERBO is nonzero if the caller has printed a verbose message about
559 the symbol reading (and complaints can be more terse about it). */
562 syms_from_objfile (struct objfile
*objfile
,
563 struct section_addr_info
*addrs
,
564 struct section_offsets
*offsets
,
569 struct section_addr_info
*local_addr
= NULL
;
570 struct cleanup
*old_chain
;
572 gdb_assert (! (addrs
&& offsets
));
574 init_entry_point_info (objfile
);
575 find_sym_fns (objfile
);
577 if (objfile
->sf
== NULL
)
578 return; /* No symbols. */
580 /* Make sure that partially constructed symbol tables will be cleaned up
581 if an error occurs during symbol reading. */
582 old_chain
= make_cleanup_free_objfile (objfile
);
584 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
585 list. We now establish the convention that an addr of zero means
586 no load address was specified. */
587 if (! addrs
&& ! offsets
)
590 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
591 make_cleanup (xfree
, local_addr
);
595 /* Now either addrs or offsets is non-zero. */
599 /* We will modify the main symbol table, make sure that all its users
600 will be cleaned up if an error occurs during symbol reading. */
601 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
603 /* Since no error yet, throw away the old symbol table. */
605 if (symfile_objfile
!= NULL
)
607 free_objfile (symfile_objfile
);
608 symfile_objfile
= NULL
;
611 /* Currently we keep symbols from the add-symbol-file command.
612 If the user wants to get rid of them, they should do "symbol-file"
613 without arguments first. Not sure this is the best behavior
616 (*objfile
->sf
->sym_new_init
) (objfile
);
619 /* Convert addr into an offset rather than an absolute address.
620 We find the lowest address of a loaded segment in the objfile,
621 and assume that <addr> is where that got loaded.
623 We no longer warn if the lowest section is not a text segment (as
624 happens for the PA64 port. */
625 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
627 asection
*lower_sect
;
629 CORE_ADDR lower_offset
;
632 /* Find lowest loadable section to be used as starting point for
633 continguous sections. FIXME!! won't work without call to find
634 .text first, but this assumes text is lowest section. */
635 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
636 if (lower_sect
== NULL
)
637 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
639 if (lower_sect
== NULL
)
640 warning ("no loadable sections found in added symbol-file %s",
643 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
644 warning ("Lowest section in %s is %s at %s",
646 bfd_section_name (objfile
->obfd
, lower_sect
),
647 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
648 if (lower_sect
!= NULL
)
649 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
653 /* Calculate offsets for the loadable sections.
654 FIXME! Sections must be in order of increasing loadable section
655 so that contiguous sections can use the lower-offset!!!
657 Adjust offsets if the segments are not contiguous.
658 If the section is contiguous, its offset should be set to
659 the offset of the highest loadable section lower than it
660 (the loadable section directly below it in memory).
661 this_offset = lower_offset = lower_addr - lower_orig_addr */
663 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
665 if (addrs
->other
[i
].addr
!= 0)
667 sect
= bfd_get_section_by_name (objfile
->obfd
,
668 addrs
->other
[i
].name
);
672 -= bfd_section_vma (objfile
->obfd
, sect
);
673 lower_offset
= addrs
->other
[i
].addr
;
674 /* This is the index used by BFD. */
675 addrs
->other
[i
].sectindex
= sect
->index
;
679 warning ("section %s not found in %s",
680 addrs
->other
[i
].name
,
682 addrs
->other
[i
].addr
= 0;
686 addrs
->other
[i
].addr
= lower_offset
;
690 /* Initialize symbol reading routines for this objfile, allow complaints to
691 appear for this new file, and record how verbose to be, then do the
692 initial symbol reading for this file. */
694 (*objfile
->sf
->sym_init
) (objfile
);
695 clear_complaints (&symfile_complaints
, 1, verbo
);
698 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
701 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
703 /* Just copy in the offset table directly as given to us. */
704 objfile
->num_sections
= num_offsets
;
705 objfile
->section_offsets
706 = ((struct section_offsets
*)
707 obstack_alloc (&objfile
->psymbol_obstack
, size
));
708 memcpy (objfile
->section_offsets
, offsets
, size
);
710 init_objfile_sect_indices (objfile
);
713 #ifndef DEPRECATED_IBM6000_TARGET
714 /* This is a SVR4/SunOS specific hack, I think. In any event, it
715 screws RS/6000. sym_offsets should be doing this sort of thing,
716 because it knows the mapping between bfd sections and
718 /* This is a hack. As far as I can tell, section offsets are not
719 target dependent. They are all set to addr with a couple of
720 exceptions. The exceptions are sysvr4 shared libraries, whose
721 offsets are kept in solib structures anyway and rs6000 xcoff
722 which handles shared libraries in a completely unique way.
724 Section offsets are built similarly, except that they are built
725 by adding addr in all cases because there is no clear mapping
726 from section_offsets into actual sections. Note that solib.c
727 has a different algorithm for finding section offsets.
729 These should probably all be collapsed into some target
730 independent form of shared library support. FIXME. */
734 struct obj_section
*s
;
736 /* Map section offsets in "addr" back to the object's
737 sections by comparing the section names with bfd's
738 section names. Then adjust the section address by
739 the offset. */ /* for gdb/13815 */
741 ALL_OBJFILE_OSECTIONS (objfile
, s
)
743 CORE_ADDR s_addr
= 0;
747 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
749 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
751 addrs
->other
[i
].name
) == 0)
752 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
754 s
->addr
-= s
->offset
;
756 s
->endaddr
-= s
->offset
;
757 s
->endaddr
+= s_addr
;
761 #endif /* not DEPRECATED_IBM6000_TARGET */
763 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
765 /* Don't allow char * to have a typename (else would get caddr_t).
766 Ditto void *. FIXME: Check whether this is now done by all the
767 symbol readers themselves (many of them now do), and if so remove
770 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
771 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
773 /* Mark the objfile has having had initial symbol read attempted. Note
774 that this does not mean we found any symbols... */
776 objfile
->flags
|= OBJF_SYMS
;
778 /* Discard cleanups as symbol reading was successful. */
780 discard_cleanups (old_chain
);
783 /* Perform required actions after either reading in the initial
784 symbols for a new objfile, or mapping in the symbols from a reusable
788 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
791 /* If this is the main symbol file we have to clean up all users of the
792 old main symbol file. Otherwise it is sufficient to fixup all the
793 breakpoints that may have been redefined by this symbol file. */
796 /* OK, make it the "real" symbol file. */
797 symfile_objfile
= objfile
;
799 clear_symtab_users ();
803 breakpoint_re_set ();
806 /* We're done reading the symbol file; finish off complaints. */
807 clear_complaints (&symfile_complaints
, 0, verbo
);
810 /* Process a symbol file, as either the main file or as a dynamically
813 NAME is the file name (which will be tilde-expanded and made
814 absolute herein) (but we don't free or modify NAME itself).
816 FROM_TTY says how verbose to be.
818 MAINLINE specifies whether this is the main symbol file, or whether
819 it's an extra symbol file such as dynamically loaded code.
821 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
822 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
825 Upon success, returns a pointer to the objfile that was added.
826 Upon failure, jumps back to command level (never returns). */
827 static struct objfile
*
828 symbol_file_add_with_addrs_or_offsets (char *name
, int from_tty
,
829 struct section_addr_info
*addrs
,
830 struct section_offsets
*offsets
,
832 int mainline
, int flags
)
834 struct objfile
*objfile
;
835 struct partial_symtab
*psymtab
;
838 struct section_addr_info
*orig_addrs
;
839 struct cleanup
*my_cleanups
;
841 /* Open a bfd for the file, and give user a chance to burp if we'd be
842 interactively wiping out any existing symbols. */
844 abfd
= symfile_bfd_open (name
);
846 if ((have_full_symbols () || have_partial_symbols ())
849 && !query ("Load new symbol table from \"%s\"? ", name
))
850 error ("Not confirmed.");
852 objfile
= allocate_objfile (abfd
, flags
);
854 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
855 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
859 orig_addrs
->num_sections
= addrs
->num_sections
;
860 for (i
= 0; i
< addrs
->num_sections
; i
++)
861 orig_addrs
->other
[i
] = addrs
->other
[i
];
864 /* If the objfile uses a mapped symbol file, and we have a psymtab for
865 it, then skip reading any symbols at this time. */
867 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
869 /* We mapped in an existing symbol table file that already has had
870 initial symbol reading performed, so we can skip that part. Notify
871 the user that instead of reading the symbols, they have been mapped.
873 if (from_tty
|| info_verbose
)
875 printf_unfiltered ("Mapped symbols for %s...", name
);
877 gdb_flush (gdb_stdout
);
879 init_entry_point_info (objfile
);
880 find_sym_fns (objfile
);
884 /* We either created a new mapped symbol table, mapped an existing
885 symbol table file which has not had initial symbol reading
886 performed, or need to read an unmapped symbol table. */
887 if (from_tty
|| info_verbose
)
889 if (pre_add_symbol_hook
)
890 pre_add_symbol_hook (name
);
893 printf_unfiltered ("Reading symbols from %s...", name
);
895 gdb_flush (gdb_stdout
);
898 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
902 /* We now have at least a partial symbol table. Check to see if the
903 user requested that all symbols be read on initial access via either
904 the gdb startup command line or on a per symbol file basis. Expand
905 all partial symbol tables for this objfile if so. */
907 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
909 if (from_tty
|| info_verbose
)
911 printf_unfiltered ("expanding to full symbols...");
913 gdb_flush (gdb_stdout
);
916 for (psymtab
= objfile
->psymtabs
;
918 psymtab
= psymtab
->next
)
920 psymtab_to_symtab (psymtab
);
924 debugfile
= find_separate_debug_file (objfile
);
929 objfile
->separate_debug_objfile
930 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
934 objfile
->separate_debug_objfile
935 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
937 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
940 /* Put the separate debug object before the normal one, this is so that
941 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
942 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
947 if (!have_partial_symbols () && !have_full_symbols ())
950 printf_unfiltered ("(no debugging symbols found)...");
954 if (from_tty
|| info_verbose
)
956 if (post_add_symbol_hook
)
957 post_add_symbol_hook ();
960 printf_unfiltered ("done.\n");
964 /* We print some messages regardless of whether 'from_tty ||
965 info_verbose' is true, so make sure they go out at the right
967 gdb_flush (gdb_stdout
);
969 do_cleanups (my_cleanups
);
971 if (objfile
->sf
== NULL
)
972 return objfile
; /* No symbols. */
974 new_symfile_objfile (objfile
, mainline
, from_tty
);
976 if (target_new_objfile_hook
)
977 target_new_objfile_hook (objfile
);
983 /* Process a symbol file, as either the main file or as a dynamically
984 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
987 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
988 int mainline
, int flags
)
990 return symbol_file_add_with_addrs_or_offsets (name
, from_tty
, addrs
, 0, 0,
995 /* Call symbol_file_add() with default values and update whatever is
996 affected by the loading of a new main().
997 Used when the file is supplied in the gdb command line
998 and by some targets with special loading requirements.
999 The auxiliary function, symbol_file_add_main_1(), has the flags
1000 argument for the switches that can only be specified in the symbol_file
1004 symbol_file_add_main (char *args
, int from_tty
)
1006 symbol_file_add_main_1 (args
, from_tty
, 0);
1010 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1012 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1015 RESET_HP_UX_GLOBALS ();
1018 /* Getting new symbols may change our opinion about
1019 what is frameless. */
1020 reinit_frame_cache ();
1022 set_initial_language ();
1026 symbol_file_clear (int from_tty
)
1028 if ((have_full_symbols () || have_partial_symbols ())
1030 && !query ("Discard symbol table from `%s'? ",
1031 symfile_objfile
->name
))
1032 error ("Not confirmed.");
1033 free_all_objfiles ();
1035 /* solib descriptors may have handles to objfiles. Since their
1036 storage has just been released, we'd better wipe the solib
1037 descriptors as well.
1039 #if defined(SOLIB_RESTART)
1043 symfile_objfile
= NULL
;
1045 printf_unfiltered ("No symbol file now.\n");
1047 RESET_HP_UX_GLOBALS ();
1052 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1055 bfd_size_type debuglink_size
;
1056 unsigned long crc32
;
1061 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1066 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1068 contents
= xmalloc (debuglink_size
);
1069 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1070 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1072 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1073 crc_offset
= strlen (contents
) + 1;
1074 crc_offset
= (crc_offset
+ 3) & ~3;
1076 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1083 separate_debug_file_exists (const char *name
, unsigned long crc
)
1085 unsigned long file_crc
= 0;
1087 char buffer
[8*1024];
1090 fd
= open (name
, O_RDONLY
| O_BINARY
);
1094 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1095 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1099 return crc
== file_crc
;
1102 static char *debug_file_directory
= NULL
;
1104 #if ! defined (DEBUG_SUBDIRECTORY)
1105 #define DEBUG_SUBDIRECTORY ".debug"
1109 find_separate_debug_file (struct objfile
*objfile
)
1116 bfd_size_type debuglink_size
;
1117 unsigned long crc32
;
1120 basename
= get_debug_link_info (objfile
, &crc32
);
1122 if (basename
== NULL
)
1125 dir
= xstrdup (objfile
->name
);
1127 /* Strip off the final filename part, leaving the directory name,
1128 followed by a slash. Objfile names should always be absolute and
1129 tilde-expanded, so there should always be a slash in there
1131 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1133 if (IS_DIR_SEPARATOR (dir
[i
]))
1136 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1139 debugfile
= alloca (strlen (debug_file_directory
) + 1
1141 + strlen (DEBUG_SUBDIRECTORY
)
1146 /* First try in the same directory as the original file. */
1147 strcpy (debugfile
, dir
);
1148 strcat (debugfile
, basename
);
1150 if (separate_debug_file_exists (debugfile
, crc32
))
1154 return xstrdup (debugfile
);
1157 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1158 strcpy (debugfile
, dir
);
1159 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1160 strcat (debugfile
, "/");
1161 strcat (debugfile
, basename
);
1163 if (separate_debug_file_exists (debugfile
, crc32
))
1167 return xstrdup (debugfile
);
1170 /* Then try in the global debugfile directory. */
1171 strcpy (debugfile
, debug_file_directory
);
1172 strcat (debugfile
, "/");
1173 strcat (debugfile
, dir
);
1174 strcat (debugfile
, basename
);
1176 if (separate_debug_file_exists (debugfile
, crc32
))
1180 return xstrdup (debugfile
);
1189 /* This is the symbol-file command. Read the file, analyze its
1190 symbols, and add a struct symtab to a symtab list. The syntax of
1191 the command is rather bizarre--(1) buildargv implements various
1192 quoting conventions which are undocumented and have little or
1193 nothing in common with the way things are quoted (or not quoted)
1194 elsewhere in GDB, (2) options are used, which are not generally
1195 used in GDB (perhaps "set mapped on", "set readnow on" would be
1196 better), (3) the order of options matters, which is contrary to GNU
1197 conventions (because it is confusing and inconvenient). */
1198 /* Note: ezannoni 2000-04-17. This function used to have support for
1199 rombug (see remote-os9k.c). It consisted of a call to target_link()
1200 (target.c) to get the address of the text segment from the target,
1201 and pass that to symbol_file_add(). This is no longer supported. */
1204 symbol_file_command (char *args
, int from_tty
)
1208 struct cleanup
*cleanups
;
1209 int flags
= OBJF_USERLOADED
;
1215 symbol_file_clear (from_tty
);
1219 if ((argv
= buildargv (args
)) == NULL
)
1223 cleanups
= make_cleanup_freeargv (argv
);
1224 while (*argv
!= NULL
)
1226 if (strcmp (*argv
, "-mapped") == 0)
1227 flags
|= OBJF_MAPPED
;
1229 if (strcmp (*argv
, "-readnow") == 0)
1230 flags
|= OBJF_READNOW
;
1233 error ("unknown option `%s'", *argv
);
1238 symbol_file_add_main_1 (name
, from_tty
, flags
);
1245 error ("no symbol file name was specified");
1247 do_cleanups (cleanups
);
1251 /* Set the initial language.
1253 A better solution would be to record the language in the psymtab when reading
1254 partial symbols, and then use it (if known) to set the language. This would
1255 be a win for formats that encode the language in an easily discoverable place,
1256 such as DWARF. For stabs, we can jump through hoops looking for specially
1257 named symbols or try to intuit the language from the specific type of stabs
1258 we find, but we can't do that until later when we read in full symbols.
1262 set_initial_language (void)
1264 struct partial_symtab
*pst
;
1265 enum language lang
= language_unknown
;
1267 pst
= find_main_psymtab ();
1270 if (pst
->filename
!= NULL
)
1272 lang
= deduce_language_from_filename (pst
->filename
);
1274 if (lang
== language_unknown
)
1276 /* Make C the default language */
1279 set_language (lang
);
1280 expected_language
= current_language
; /* Don't warn the user */
1284 /* Open file specified by NAME and hand it off to BFD for preliminary
1285 analysis. Result is a newly initialized bfd *, which includes a newly
1286 malloc'd` copy of NAME (tilde-expanded and made absolute).
1287 In case of trouble, error() is called. */
1290 symfile_bfd_open (char *name
)
1294 char *absolute_name
;
1298 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1300 /* Look down path for it, allocate 2nd new malloc'd copy. */
1301 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1302 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1305 char *exename
= alloca (strlen (name
) + 5);
1306 strcat (strcpy (exename
, name
), ".exe");
1307 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1313 make_cleanup (xfree
, name
);
1314 perror_with_name (name
);
1316 xfree (name
); /* Free 1st new malloc'd copy */
1317 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1318 /* It'll be freed in free_objfile(). */
1320 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1324 make_cleanup (xfree
, name
);
1325 error ("\"%s\": can't open to read symbols: %s.", name
,
1326 bfd_errmsg (bfd_get_error ()));
1328 sym_bfd
->cacheable
= 1;
1330 if (!bfd_check_format (sym_bfd
, bfd_object
))
1332 /* FIXME: should be checking for errors from bfd_close (for one thing,
1333 on error it does not free all the storage associated with the
1335 bfd_close (sym_bfd
); /* This also closes desc */
1336 make_cleanup (xfree
, name
);
1337 error ("\"%s\": can't read symbols: %s.", name
,
1338 bfd_errmsg (bfd_get_error ()));
1343 /* Return the section index for the given section name. Return -1 if
1344 the section was not found. */
1346 get_section_index (struct objfile
*objfile
, char *section_name
)
1348 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1355 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1356 startup by the _initialize routine in each object file format reader,
1357 to register information about each format the the reader is prepared
1361 add_symtab_fns (struct sym_fns
*sf
)
1363 sf
->next
= symtab_fns
;
1368 /* Initialize to read symbols from the symbol file sym_bfd. It either
1369 returns or calls error(). The result is an initialized struct sym_fns
1370 in the objfile structure, that contains cached information about the
1374 find_sym_fns (struct objfile
*objfile
)
1377 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1378 char *our_target
= bfd_get_target (objfile
->obfd
);
1380 if (our_flavour
== bfd_target_srec_flavour
1381 || our_flavour
== bfd_target_ihex_flavour
1382 || our_flavour
== bfd_target_tekhex_flavour
)
1383 return; /* No symbols. */
1385 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1387 if (our_flavour
== sf
->sym_flavour
)
1393 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1394 bfd_get_target (objfile
->obfd
));
1397 /* This function runs the load command of our current target. */
1400 load_command (char *arg
, int from_tty
)
1403 arg
= get_exec_file (1);
1404 target_load (arg
, from_tty
);
1406 /* After re-loading the executable, we don't really know which
1407 overlays are mapped any more. */
1408 overlay_cache_invalid
= 1;
1411 /* This version of "load" should be usable for any target. Currently
1412 it is just used for remote targets, not inftarg.c or core files,
1413 on the theory that only in that case is it useful.
1415 Avoiding xmodem and the like seems like a win (a) because we don't have
1416 to worry about finding it, and (b) On VMS, fork() is very slow and so
1417 we don't want to run a subprocess. On the other hand, I'm not sure how
1418 performance compares. */
1420 static int download_write_size
= 512;
1421 static int validate_download
= 0;
1423 /* Callback service function for generic_load (bfd_map_over_sections). */
1426 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1428 bfd_size_type
*sum
= data
;
1430 *sum
+= bfd_get_section_size_before_reloc (asec
);
1433 /* Opaque data for load_section_callback. */
1434 struct load_section_data
{
1435 unsigned long load_offset
;
1436 unsigned long write_count
;
1437 unsigned long data_count
;
1438 bfd_size_type total_size
;
1441 /* Callback service function for generic_load (bfd_map_over_sections). */
1444 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1446 struct load_section_data
*args
= data
;
1448 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1450 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1454 struct cleanup
*old_chain
;
1455 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1456 bfd_size_type block_size
;
1458 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1461 if (download_write_size
> 0 && size
> download_write_size
)
1462 block_size
= download_write_size
;
1466 buffer
= xmalloc (size
);
1467 old_chain
= make_cleanup (xfree
, buffer
);
1469 /* Is this really necessary? I guess it gives the user something
1470 to look at during a long download. */
1471 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1472 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1474 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1480 bfd_size_type this_transfer
= size
- sent
;
1482 if (this_transfer
>= block_size
)
1483 this_transfer
= block_size
;
1484 len
= target_write_memory_partial (lma
, buffer
,
1485 this_transfer
, &err
);
1488 if (validate_download
)
1490 /* Broken memories and broken monitors manifest
1491 themselves here when bring new computers to
1492 life. This doubles already slow downloads. */
1493 /* NOTE: cagney/1999-10-18: A more efficient
1494 implementation might add a verify_memory()
1495 method to the target vector and then use
1496 that. remote.c could implement that method
1497 using the ``qCRC'' packet. */
1498 char *check
= xmalloc (len
);
1499 struct cleanup
*verify_cleanups
=
1500 make_cleanup (xfree
, check
);
1502 if (target_read_memory (lma
, check
, len
) != 0)
1503 error ("Download verify read failed at 0x%s",
1505 if (memcmp (buffer
, check
, len
) != 0)
1506 error ("Download verify compare failed at 0x%s",
1508 do_cleanups (verify_cleanups
);
1510 args
->data_count
+= len
;
1513 args
->write_count
+= 1;
1516 || (ui_load_progress_hook
!= NULL
1517 && ui_load_progress_hook (sect_name
, sent
)))
1518 error ("Canceled the download");
1520 if (show_load_progress
!= NULL
)
1521 show_load_progress (sect_name
, sent
, size
,
1522 args
->data_count
, args
->total_size
);
1524 while (sent
< size
);
1527 error ("Memory access error while loading section %s.", sect_name
);
1529 do_cleanups (old_chain
);
1535 generic_load (char *args
, int from_tty
)
1539 time_t start_time
, end_time
; /* Start and end times of download */
1541 struct cleanup
*old_cleanups
;
1543 struct load_section_data cbdata
;
1546 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1547 cbdata
.write_count
= 0; /* Number of writes needed. */
1548 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1549 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1551 /* Parse the input argument - the user can specify a load offset as
1552 a second argument. */
1553 filename
= xmalloc (strlen (args
) + 1);
1554 old_cleanups
= make_cleanup (xfree
, filename
);
1555 strcpy (filename
, args
);
1556 offptr
= strchr (filename
, ' ');
1561 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1562 if (offptr
== endptr
)
1563 error ("Invalid download offset:%s\n", offptr
);
1567 cbdata
.load_offset
= 0;
1569 /* Open the file for loading. */
1570 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1571 if (loadfile_bfd
== NULL
)
1573 perror_with_name (filename
);
1577 /* FIXME: should be checking for errors from bfd_close (for one thing,
1578 on error it does not free all the storage associated with the
1580 make_cleanup_bfd_close (loadfile_bfd
);
1582 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1584 error ("\"%s\" is not an object file: %s", filename
,
1585 bfd_errmsg (bfd_get_error ()));
1588 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1589 (void *) &cbdata
.total_size
);
1591 start_time
= time (NULL
);
1593 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1595 end_time
= time (NULL
);
1597 entry
= bfd_get_start_address (loadfile_bfd
);
1598 ui_out_text (uiout
, "Start address ");
1599 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1600 ui_out_text (uiout
, ", load size ");
1601 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1602 ui_out_text (uiout
, "\n");
1603 /* We were doing this in remote-mips.c, I suspect it is right
1604 for other targets too. */
1607 /* FIXME: are we supposed to call symbol_file_add or not? According
1608 to a comment from remote-mips.c (where a call to symbol_file_add
1609 was commented out), making the call confuses GDB if more than one
1610 file is loaded in. Some targets do (e.g., remote-vx.c) but
1611 others don't (or didn't - perhaphs they have all been deleted). */
1613 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1614 cbdata
.write_count
, end_time
- start_time
);
1616 do_cleanups (old_cleanups
);
1619 /* Report how fast the transfer went. */
1621 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1622 replaced by print_transfer_performance (with a very different
1623 function signature). */
1626 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1629 print_transfer_performance (gdb_stdout
, data_count
,
1630 end_time
- start_time
, 0);
1634 print_transfer_performance (struct ui_file
*stream
,
1635 unsigned long data_count
,
1636 unsigned long write_count
,
1637 unsigned long time_count
)
1639 ui_out_text (uiout
, "Transfer rate: ");
1642 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1643 (data_count
* 8) / time_count
);
1644 ui_out_text (uiout
, " bits/sec");
1648 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1649 ui_out_text (uiout
, " bits in <1 sec");
1651 if (write_count
> 0)
1653 ui_out_text (uiout
, ", ");
1654 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1655 ui_out_text (uiout
, " bytes/write");
1657 ui_out_text (uiout
, ".\n");
1660 /* This function allows the addition of incrementally linked object files.
1661 It does not modify any state in the target, only in the debugger. */
1662 /* Note: ezannoni 2000-04-13 This function/command used to have a
1663 special case syntax for the rombug target (Rombug is the boot
1664 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1665 rombug case, the user doesn't need to supply a text address,
1666 instead a call to target_link() (in target.c) would supply the
1667 value to use. We are now discontinuing this type of ad hoc syntax. */
1670 add_symbol_file_command (char *args
, int from_tty
)
1672 char *filename
= NULL
;
1673 int flags
= OBJF_USERLOADED
;
1675 int expecting_option
= 0;
1676 int section_index
= 0;
1680 int expecting_sec_name
= 0;
1681 int expecting_sec_addr
= 0;
1689 struct section_addr_info
*section_addrs
;
1690 struct sect_opt
*sect_opts
= NULL
;
1691 size_t num_sect_opts
= 0;
1692 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1695 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1696 * sizeof (struct sect_opt
));
1701 error ("add-symbol-file takes a file name and an address");
1703 /* Make a copy of the string that we can safely write into. */
1704 args
= xstrdup (args
);
1706 while (*args
!= '\000')
1708 /* Any leading spaces? */
1709 while (isspace (*args
))
1712 /* Point arg to the beginning of the argument. */
1715 /* Move args pointer over the argument. */
1716 while ((*args
!= '\000') && !isspace (*args
))
1719 /* If there are more arguments, terminate arg and
1721 if (*args
!= '\000')
1724 /* Now process the argument. */
1727 /* The first argument is the file name. */
1728 filename
= tilde_expand (arg
);
1729 make_cleanup (xfree
, filename
);
1734 /* The second argument is always the text address at which
1735 to load the program. */
1736 sect_opts
[section_index
].name
= ".text";
1737 sect_opts
[section_index
].value
= arg
;
1738 if (++section_index
> num_sect_opts
)
1741 sect_opts
= ((struct sect_opt
*)
1742 xrealloc (sect_opts
,
1744 * sizeof (struct sect_opt
)));
1749 /* It's an option (starting with '-') or it's an argument
1754 if (strcmp (arg
, "-mapped") == 0)
1755 flags
|= OBJF_MAPPED
;
1757 if (strcmp (arg
, "-readnow") == 0)
1758 flags
|= OBJF_READNOW
;
1760 if (strcmp (arg
, "-s") == 0)
1762 expecting_sec_name
= 1;
1763 expecting_sec_addr
= 1;
1768 if (expecting_sec_name
)
1770 sect_opts
[section_index
].name
= arg
;
1771 expecting_sec_name
= 0;
1774 if (expecting_sec_addr
)
1776 sect_opts
[section_index
].value
= arg
;
1777 expecting_sec_addr
= 0;
1778 if (++section_index
> num_sect_opts
)
1781 sect_opts
= ((struct sect_opt
*)
1782 xrealloc (sect_opts
,
1784 * sizeof (struct sect_opt
)));
1788 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1794 /* Print the prompt for the query below. And save the arguments into
1795 a sect_addr_info structure to be passed around to other
1796 functions. We have to split this up into separate print
1797 statements because local_hex_string returns a local static
1800 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename
);
1801 section_addrs
= alloc_section_addr_info (section_index
);
1802 make_cleanup (xfree
, section_addrs
);
1803 for (i
= 0; i
< section_index
; i
++)
1806 char *val
= sect_opts
[i
].value
;
1807 char *sec
= sect_opts
[i
].name
;
1809 addr
= parse_and_eval_address (val
);
1811 /* Here we store the section offsets in the order they were
1812 entered on the command line. */
1813 section_addrs
->other
[sec_num
].name
= sec
;
1814 section_addrs
->other
[sec_num
].addr
= addr
;
1815 printf_unfiltered ("\t%s_addr = %s\n",
1817 local_hex_string ((unsigned long)addr
));
1820 /* The object's sections are initialized when a
1821 call is made to build_objfile_section_table (objfile).
1822 This happens in reread_symbols.
1823 At this point, we don't know what file type this is,
1824 so we can't determine what section names are valid. */
1827 if (from_tty
&& (!query ("%s", "")))
1828 error ("Not confirmed.");
1830 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1832 /* Getting new symbols may change our opinion about what is
1834 reinit_frame_cache ();
1835 do_cleanups (my_cleanups
);
1839 add_shared_symbol_files_command (char *args
, int from_tty
)
1841 #ifdef ADD_SHARED_SYMBOL_FILES
1842 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1844 error ("This command is not available in this configuration of GDB.");
1848 /* Re-read symbols if a symbol-file has changed. */
1850 reread_symbols (void)
1852 struct objfile
*objfile
;
1855 struct stat new_statbuf
;
1858 /* With the addition of shared libraries, this should be modified,
1859 the load time should be saved in the partial symbol tables, since
1860 different tables may come from different source files. FIXME.
1861 This routine should then walk down each partial symbol table
1862 and see if the symbol table that it originates from has been changed */
1864 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1868 #ifdef DEPRECATED_IBM6000_TARGET
1869 /* If this object is from a shared library, then you should
1870 stat on the library name, not member name. */
1872 if (objfile
->obfd
->my_archive
)
1873 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1876 res
= stat (objfile
->name
, &new_statbuf
);
1879 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1880 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1884 new_modtime
= new_statbuf
.st_mtime
;
1885 if (new_modtime
!= objfile
->mtime
)
1887 struct cleanup
*old_cleanups
;
1888 struct section_offsets
*offsets
;
1890 char *obfd_filename
;
1892 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1895 /* There are various functions like symbol_file_add,
1896 symfile_bfd_open, syms_from_objfile, etc., which might
1897 appear to do what we want. But they have various other
1898 effects which we *don't* want. So we just do stuff
1899 ourselves. We don't worry about mapped files (for one thing,
1900 any mapped file will be out of date). */
1902 /* If we get an error, blow away this objfile (not sure if
1903 that is the correct response for things like shared
1905 old_cleanups
= make_cleanup_free_objfile (objfile
);
1906 /* We need to do this whenever any symbols go away. */
1907 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1909 /* Clean up any state BFD has sitting around. We don't need
1910 to close the descriptor but BFD lacks a way of closing the
1911 BFD without closing the descriptor. */
1912 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1913 if (!bfd_close (objfile
->obfd
))
1914 error ("Can't close BFD for %s: %s", objfile
->name
,
1915 bfd_errmsg (bfd_get_error ()));
1916 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1917 if (objfile
->obfd
== NULL
)
1918 error ("Can't open %s to read symbols.", objfile
->name
);
1919 /* bfd_openr sets cacheable to true, which is what we want. */
1920 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1921 error ("Can't read symbols from %s: %s.", objfile
->name
,
1922 bfd_errmsg (bfd_get_error ()));
1924 /* Save the offsets, we will nuke them with the rest of the
1926 num_offsets
= objfile
->num_sections
;
1927 offsets
= ((struct section_offsets
*)
1928 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1929 memcpy (offsets
, objfile
->section_offsets
,
1930 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1932 /* Nuke all the state that we will re-read. Much of the following
1933 code which sets things to NULL really is necessary to tell
1934 other parts of GDB that there is nothing currently there. */
1936 /* FIXME: Do we have to free a whole linked list, or is this
1938 if (objfile
->global_psymbols
.list
)
1939 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1940 memset (&objfile
->global_psymbols
, 0,
1941 sizeof (objfile
->global_psymbols
));
1942 if (objfile
->static_psymbols
.list
)
1943 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1944 memset (&objfile
->static_psymbols
, 0,
1945 sizeof (objfile
->static_psymbols
));
1947 /* Free the obstacks for non-reusable objfiles */
1948 bcache_xfree (objfile
->psymbol_cache
);
1949 objfile
->psymbol_cache
= bcache_xmalloc ();
1950 bcache_xfree (objfile
->macro_cache
);
1951 objfile
->macro_cache
= bcache_xmalloc ();
1952 if (objfile
->demangled_names_hash
!= NULL
)
1954 htab_delete (objfile
->demangled_names_hash
);
1955 objfile
->demangled_names_hash
= NULL
;
1957 obstack_free (&objfile
->psymbol_obstack
, 0);
1958 obstack_free (&objfile
->symbol_obstack
, 0);
1959 obstack_free (&objfile
->type_obstack
, 0);
1960 objfile
->sections
= NULL
;
1961 objfile
->symtabs
= NULL
;
1962 objfile
->psymtabs
= NULL
;
1963 objfile
->free_psymtabs
= NULL
;
1964 objfile
->msymbols
= NULL
;
1965 objfile
->sym_private
= NULL
;
1966 objfile
->minimal_symbol_count
= 0;
1967 memset (&objfile
->msymbol_hash
, 0,
1968 sizeof (objfile
->msymbol_hash
));
1969 memset (&objfile
->msymbol_demangled_hash
, 0,
1970 sizeof (objfile
->msymbol_demangled_hash
));
1971 objfile
->fundamental_types
= NULL
;
1972 clear_objfile_data (objfile
);
1973 if (objfile
->sf
!= NULL
)
1975 (*objfile
->sf
->sym_finish
) (objfile
);
1978 /* We never make this a mapped file. */
1980 /* obstack_specify_allocation also initializes the obstack so
1982 objfile
->psymbol_cache
= bcache_xmalloc ();
1983 objfile
->macro_cache
= bcache_xmalloc ();
1984 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1986 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1988 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1990 if (build_objfile_section_table (objfile
))
1992 error ("Can't find the file sections in `%s': %s",
1993 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1995 terminate_minimal_symbol_table (objfile
);
1997 /* We use the same section offsets as from last time. I'm not
1998 sure whether that is always correct for shared libraries. */
1999 objfile
->section_offsets
= (struct section_offsets
*)
2000 obstack_alloc (&objfile
->psymbol_obstack
,
2001 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2002 memcpy (objfile
->section_offsets
, offsets
,
2003 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2004 objfile
->num_sections
= num_offsets
;
2006 /* What the hell is sym_new_init for, anyway? The concept of
2007 distinguishing between the main file and additional files
2008 in this way seems rather dubious. */
2009 if (objfile
== symfile_objfile
)
2011 (*objfile
->sf
->sym_new_init
) (objfile
);
2013 RESET_HP_UX_GLOBALS ();
2017 (*objfile
->sf
->sym_init
) (objfile
);
2018 clear_complaints (&symfile_complaints
, 1, 1);
2019 /* The "mainline" parameter is a hideous hack; I think leaving it
2020 zero is OK since dbxread.c also does what it needs to do if
2021 objfile->global_psymbols.size is 0. */
2022 (*objfile
->sf
->sym_read
) (objfile
, 0);
2023 if (!have_partial_symbols () && !have_full_symbols ())
2026 printf_unfiltered ("(no debugging symbols found)\n");
2029 objfile
->flags
|= OBJF_SYMS
;
2031 /* We're done reading the symbol file; finish off complaints. */
2032 clear_complaints (&symfile_complaints
, 0, 1);
2034 /* Getting new symbols may change our opinion about what is
2037 reinit_frame_cache ();
2039 /* Discard cleanups as symbol reading was successful. */
2040 discard_cleanups (old_cleanups
);
2042 /* If the mtime has changed between the time we set new_modtime
2043 and now, we *want* this to be out of date, so don't call stat
2045 objfile
->mtime
= new_modtime
;
2047 reread_separate_symbols (objfile
);
2053 clear_symtab_users ();
2057 /* Handle separate debug info for OBJFILE, which has just been
2059 - If we had separate debug info before, but now we don't, get rid
2060 of the separated objfile.
2061 - If we didn't have separated debug info before, but now we do,
2062 read in the new separated debug info file.
2063 - If the debug link points to a different file, toss the old one
2064 and read the new one.
2065 This function does *not* handle the case where objfile is still
2066 using the same separate debug info file, but that file's timestamp
2067 has changed. That case should be handled by the loop in
2068 reread_symbols already. */
2070 reread_separate_symbols (struct objfile
*objfile
)
2073 unsigned long crc32
;
2075 /* Does the updated objfile's debug info live in a
2077 debug_file
= find_separate_debug_file (objfile
);
2079 if (objfile
->separate_debug_objfile
)
2081 /* There are two cases where we need to get rid of
2082 the old separated debug info objfile:
2083 - if the new primary objfile doesn't have
2084 separated debug info, or
2085 - if the new primary objfile has separate debug
2086 info, but it's under a different filename.
2088 If the old and new objfiles both have separate
2089 debug info, under the same filename, then we're
2090 okay --- if the separated file's contents have
2091 changed, we will have caught that when we
2092 visited it in this function's outermost
2095 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2096 free_objfile (objfile
->separate_debug_objfile
);
2099 /* If the new objfile has separate debug info, and we
2100 haven't loaded it already, do so now. */
2102 && ! objfile
->separate_debug_objfile
)
2104 /* Use the same section offset table as objfile itself.
2105 Preserve the flags from objfile that make sense. */
2106 objfile
->separate_debug_objfile
2107 = (symbol_file_add_with_addrs_or_offsets
2109 info_verbose
, /* from_tty: Don't override the default. */
2110 0, /* No addr table. */
2111 objfile
->section_offsets
, objfile
->num_sections
,
2112 0, /* Not mainline. See comments about this above. */
2113 objfile
->flags
& (OBJF_MAPPED
| OBJF_REORDERED
2114 | OBJF_SHARED
| OBJF_READNOW
2115 | OBJF_USERLOADED
)));
2116 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2132 static filename_language
*filename_language_table
;
2133 static int fl_table_size
, fl_table_next
;
2136 add_filename_language (char *ext
, enum language lang
)
2138 if (fl_table_next
>= fl_table_size
)
2140 fl_table_size
+= 10;
2141 filename_language_table
=
2142 xrealloc (filename_language_table
,
2143 fl_table_size
* sizeof (*filename_language_table
));
2146 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2147 filename_language_table
[fl_table_next
].lang
= lang
;
2151 static char *ext_args
;
2154 set_ext_lang_command (char *args
, int from_tty
)
2157 char *cp
= ext_args
;
2160 /* First arg is filename extension, starting with '.' */
2162 error ("'%s': Filename extension must begin with '.'", ext_args
);
2164 /* Find end of first arg. */
2165 while (*cp
&& !isspace (*cp
))
2169 error ("'%s': two arguments required -- filename extension and language",
2172 /* Null-terminate first arg */
2175 /* Find beginning of second arg, which should be a source language. */
2176 while (*cp
&& isspace (*cp
))
2180 error ("'%s': two arguments required -- filename extension and language",
2183 /* Lookup the language from among those we know. */
2184 lang
= language_enum (cp
);
2186 /* Now lookup the filename extension: do we already know it? */
2187 for (i
= 0; i
< fl_table_next
; i
++)
2188 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2191 if (i
>= fl_table_next
)
2193 /* new file extension */
2194 add_filename_language (ext_args
, lang
);
2198 /* redefining a previously known filename extension */
2201 /* query ("Really make files of type %s '%s'?", */
2202 /* ext_args, language_str (lang)); */
2204 xfree (filename_language_table
[i
].ext
);
2205 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2206 filename_language_table
[i
].lang
= lang
;
2211 info_ext_lang_command (char *args
, int from_tty
)
2215 printf_filtered ("Filename extensions and the languages they represent:");
2216 printf_filtered ("\n\n");
2217 for (i
= 0; i
< fl_table_next
; i
++)
2218 printf_filtered ("\t%s\t- %s\n",
2219 filename_language_table
[i
].ext
,
2220 language_str (filename_language_table
[i
].lang
));
2224 init_filename_language_table (void)
2226 if (fl_table_size
== 0) /* protect against repetition */
2230 filename_language_table
=
2231 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2232 add_filename_language (".c", language_c
);
2233 add_filename_language (".C", language_cplus
);
2234 add_filename_language (".cc", language_cplus
);
2235 add_filename_language (".cp", language_cplus
);
2236 add_filename_language (".cpp", language_cplus
);
2237 add_filename_language (".cxx", language_cplus
);
2238 add_filename_language (".c++", language_cplus
);
2239 add_filename_language (".java", language_java
);
2240 add_filename_language (".class", language_java
);
2241 add_filename_language (".m", language_objc
);
2242 add_filename_language (".f", language_fortran
);
2243 add_filename_language (".F", language_fortran
);
2244 add_filename_language (".s", language_asm
);
2245 add_filename_language (".S", language_asm
);
2246 add_filename_language (".pas", language_pascal
);
2247 add_filename_language (".p", language_pascal
);
2248 add_filename_language (".pp", language_pascal
);
2253 deduce_language_from_filename (char *filename
)
2258 if (filename
!= NULL
)
2259 if ((cp
= strrchr (filename
, '.')) != NULL
)
2260 for (i
= 0; i
< fl_table_next
; i
++)
2261 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2262 return filename_language_table
[i
].lang
;
2264 return language_unknown
;
2269 Allocate and partly initialize a new symbol table. Return a pointer
2270 to it. error() if no space.
2272 Caller must set these fields:
2278 possibly free_named_symtabs (symtab->filename);
2282 allocate_symtab (char *filename
, struct objfile
*objfile
)
2284 struct symtab
*symtab
;
2286 symtab
= (struct symtab
*)
2287 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2288 memset (symtab
, 0, sizeof (*symtab
));
2289 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2290 &objfile
->symbol_obstack
);
2291 symtab
->fullname
= NULL
;
2292 symtab
->language
= deduce_language_from_filename (filename
);
2293 symtab
->debugformat
= obsavestring ("unknown", 7,
2294 &objfile
->symbol_obstack
);
2296 /* Hook it to the objfile it comes from */
2298 symtab
->objfile
= objfile
;
2299 symtab
->next
= objfile
->symtabs
;
2300 objfile
->symtabs
= symtab
;
2302 /* FIXME: This should go away. It is only defined for the Z8000,
2303 and the Z8000 definition of this macro doesn't have anything to
2304 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2305 here for convenience. */
2306 #ifdef INIT_EXTRA_SYMTAB_INFO
2307 INIT_EXTRA_SYMTAB_INFO (symtab
);
2313 struct partial_symtab
*
2314 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2316 struct partial_symtab
*psymtab
;
2318 if (objfile
->free_psymtabs
)
2320 psymtab
= objfile
->free_psymtabs
;
2321 objfile
->free_psymtabs
= psymtab
->next
;
2324 psymtab
= (struct partial_symtab
*)
2325 obstack_alloc (&objfile
->psymbol_obstack
,
2326 sizeof (struct partial_symtab
));
2328 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2329 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2330 &objfile
->psymbol_obstack
);
2331 psymtab
->symtab
= NULL
;
2333 /* Prepend it to the psymtab list for the objfile it belongs to.
2334 Psymtabs are searched in most recent inserted -> least recent
2337 psymtab
->objfile
= objfile
;
2338 psymtab
->next
= objfile
->psymtabs
;
2339 objfile
->psymtabs
= psymtab
;
2342 struct partial_symtab
**prev_pst
;
2343 psymtab
->objfile
= objfile
;
2344 psymtab
->next
= NULL
;
2345 prev_pst
= &(objfile
->psymtabs
);
2346 while ((*prev_pst
) != NULL
)
2347 prev_pst
= &((*prev_pst
)->next
);
2348 (*prev_pst
) = psymtab
;
2356 discard_psymtab (struct partial_symtab
*pst
)
2358 struct partial_symtab
**prev_pst
;
2361 Empty psymtabs happen as a result of header files which don't
2362 have any symbols in them. There can be a lot of them. But this
2363 check is wrong, in that a psymtab with N_SLINE entries but
2364 nothing else is not empty, but we don't realize that. Fixing
2365 that without slowing things down might be tricky. */
2367 /* First, snip it out of the psymtab chain */
2369 prev_pst
= &(pst
->objfile
->psymtabs
);
2370 while ((*prev_pst
) != pst
)
2371 prev_pst
= &((*prev_pst
)->next
);
2372 (*prev_pst
) = pst
->next
;
2374 /* Next, put it on a free list for recycling */
2376 pst
->next
= pst
->objfile
->free_psymtabs
;
2377 pst
->objfile
->free_psymtabs
= pst
;
2381 /* Reset all data structures in gdb which may contain references to symbol
2385 clear_symtab_users (void)
2387 /* Someday, we should do better than this, by only blowing away
2388 the things that really need to be blown. */
2389 clear_value_history ();
2391 clear_internalvars ();
2392 breakpoint_re_set ();
2393 set_default_breakpoint (0, 0, 0, 0);
2394 clear_current_source_symtab_and_line ();
2395 clear_pc_function_cache ();
2396 if (target_new_objfile_hook
)
2397 target_new_objfile_hook (NULL
);
2401 clear_symtab_users_cleanup (void *ignore
)
2403 clear_symtab_users ();
2406 /* clear_symtab_users_once:
2408 This function is run after symbol reading, or from a cleanup.
2409 If an old symbol table was obsoleted, the old symbol table
2410 has been blown away, but the other GDB data structures that may
2411 reference it have not yet been cleared or re-directed. (The old
2412 symtab was zapped, and the cleanup queued, in free_named_symtab()
2415 This function can be queued N times as a cleanup, or called
2416 directly; it will do all the work the first time, and then will be a
2417 no-op until the next time it is queued. This works by bumping a
2418 counter at queueing time. Much later when the cleanup is run, or at
2419 the end of symbol processing (in case the cleanup is discarded), if
2420 the queued count is greater than the "done-count", we do the work
2421 and set the done-count to the queued count. If the queued count is
2422 less than or equal to the done-count, we just ignore the call. This
2423 is needed because reading a single .o file will often replace many
2424 symtabs (one per .h file, for example), and we don't want to reset
2425 the breakpoints N times in the user's face.
2427 The reason we both queue a cleanup, and call it directly after symbol
2428 reading, is because the cleanup protects us in case of errors, but is
2429 discarded if symbol reading is successful. */
2432 /* FIXME: As free_named_symtabs is currently a big noop this function
2433 is no longer needed. */
2434 static void clear_symtab_users_once (void);
2436 static int clear_symtab_users_queued
;
2437 static int clear_symtab_users_done
;
2440 clear_symtab_users_once (void)
2442 /* Enforce once-per-`do_cleanups'-semantics */
2443 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2445 clear_symtab_users_done
= clear_symtab_users_queued
;
2447 clear_symtab_users ();
2451 /* Delete the specified psymtab, and any others that reference it. */
2454 cashier_psymtab (struct partial_symtab
*pst
)
2456 struct partial_symtab
*ps
, *pprev
= NULL
;
2459 /* Find its previous psymtab in the chain */
2460 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2469 /* Unhook it from the chain. */
2470 if (ps
== pst
->objfile
->psymtabs
)
2471 pst
->objfile
->psymtabs
= ps
->next
;
2473 pprev
->next
= ps
->next
;
2475 /* FIXME, we can't conveniently deallocate the entries in the
2476 partial_symbol lists (global_psymbols/static_psymbols) that
2477 this psymtab points to. These just take up space until all
2478 the psymtabs are reclaimed. Ditto the dependencies list and
2479 filename, which are all in the psymbol_obstack. */
2481 /* We need to cashier any psymtab that has this one as a dependency... */
2483 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2485 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2487 if (ps
->dependencies
[i
] == pst
)
2489 cashier_psymtab (ps
);
2490 goto again
; /* Must restart, chain has been munged. */
2497 /* If a symtab or psymtab for filename NAME is found, free it along
2498 with any dependent breakpoints, displays, etc.
2499 Used when loading new versions of object modules with the "add-file"
2500 command. This is only called on the top-level symtab or psymtab's name;
2501 it is not called for subsidiary files such as .h files.
2503 Return value is 1 if we blew away the environment, 0 if not.
2504 FIXME. The return value appears to never be used.
2506 FIXME. I think this is not the best way to do this. We should
2507 work on being gentler to the environment while still cleaning up
2508 all stray pointers into the freed symtab. */
2511 free_named_symtabs (char *name
)
2514 /* FIXME: With the new method of each objfile having it's own
2515 psymtab list, this function needs serious rethinking. In particular,
2516 why was it ever necessary to toss psymtabs with specific compilation
2517 unit filenames, as opposed to all psymtabs from a particular symbol
2519 Well, the answer is that some systems permit reloading of particular
2520 compilation units. We want to blow away any old info about these
2521 compilation units, regardless of which objfiles they arrived in. --gnu. */
2524 struct symtab
*prev
;
2525 struct partial_symtab
*ps
;
2526 struct blockvector
*bv
;
2529 /* We only wack things if the symbol-reload switch is set. */
2530 if (!symbol_reloading
)
2533 /* Some symbol formats have trouble providing file names... */
2534 if (name
== 0 || *name
== '\0')
2537 /* Look for a psymtab with the specified name. */
2540 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2542 if (strcmp (name
, ps
->filename
) == 0)
2544 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2545 goto again2
; /* Must restart, chain has been munged */
2549 /* Look for a symtab with the specified name. */
2551 for (s
= symtab_list
; s
; s
= s
->next
)
2553 if (strcmp (name
, s
->filename
) == 0)
2560 if (s
== symtab_list
)
2561 symtab_list
= s
->next
;
2563 prev
->next
= s
->next
;
2565 /* For now, queue a delete for all breakpoints, displays, etc., whether
2566 or not they depend on the symtab being freed. This should be
2567 changed so that only those data structures affected are deleted. */
2569 /* But don't delete anything if the symtab is empty.
2570 This test is necessary due to a bug in "dbxread.c" that
2571 causes empty symtabs to be created for N_SO symbols that
2572 contain the pathname of the object file. (This problem
2573 has been fixed in GDB 3.9x). */
2575 bv
= BLOCKVECTOR (s
);
2576 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2577 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2578 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2580 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2582 clear_symtab_users_queued
++;
2583 make_cleanup (clear_symtab_users_once
, 0);
2588 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2596 /* It is still possible that some breakpoints will be affected
2597 even though no symtab was found, since the file might have
2598 been compiled without debugging, and hence not be associated
2599 with a symtab. In order to handle this correctly, we would need
2600 to keep a list of text address ranges for undebuggable files.
2601 For now, we do nothing, since this is a fairly obscure case. */
2605 /* FIXME, what about the minimal symbol table? */
2612 /* Allocate and partially fill a partial symtab. It will be
2613 completely filled at the end of the symbol list.
2615 FILENAME is the name of the symbol-file we are reading from. */
2617 struct partial_symtab
*
2618 start_psymtab_common (struct objfile
*objfile
,
2619 struct section_offsets
*section_offsets
, char *filename
,
2620 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2621 struct partial_symbol
**static_syms
)
2623 struct partial_symtab
*psymtab
;
2625 psymtab
= allocate_psymtab (filename
, objfile
);
2626 psymtab
->section_offsets
= section_offsets
;
2627 psymtab
->textlow
= textlow
;
2628 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2629 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2630 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2634 /* Add a symbol with a long value to a psymtab.
2635 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2636 Return the partial symbol that has been added. */
2638 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2639 symbol is so that callers can get access to the symbol's demangled
2640 name, which they don't have any cheap way to determine otherwise.
2641 (Currenly, dwarf2read.c is the only file who uses that information,
2642 though it's possible that other readers might in the future.)
2643 Elena wasn't thrilled about that, and I don't blame her, but we
2644 couldn't come up with a better way to get that information. If
2645 it's needed in other situations, we could consider breaking up
2646 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2649 const struct partial_symbol
*
2650 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2651 enum address_class
class,
2652 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2653 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2654 enum language language
, struct objfile
*objfile
)
2656 struct partial_symbol
*psym
;
2657 char *buf
= alloca (namelength
+ 1);
2658 /* psymbol is static so that there will be no uninitialized gaps in the
2659 structure which might contain random data, causing cache misses in
2661 static struct partial_symbol psymbol
;
2663 /* Create local copy of the partial symbol */
2664 memcpy (buf
, name
, namelength
);
2665 buf
[namelength
] = '\0';
2666 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2669 SYMBOL_VALUE (&psymbol
) = val
;
2673 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2675 SYMBOL_SECTION (&psymbol
) = 0;
2676 SYMBOL_LANGUAGE (&psymbol
) = language
;
2677 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2678 PSYMBOL_CLASS (&psymbol
) = class;
2680 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2682 /* Stash the partial symbol away in the cache */
2683 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2684 objfile
->psymbol_cache
);
2686 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2687 if (list
->next
>= list
->list
+ list
->size
)
2689 extend_psymbol_list (list
, objfile
);
2691 *list
->next
++ = psym
;
2692 OBJSTAT (objfile
, n_psyms
++);
2697 /* Add a symbol with a long value to a psymtab. This differs from
2698 * add_psymbol_to_list above in taking both a mangled and a demangled
2702 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2703 int dem_namelength
, domain_enum domain
,
2704 enum address_class
class,
2705 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2706 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2707 enum language language
,
2708 struct objfile
*objfile
)
2710 struct partial_symbol
*psym
;
2711 char *buf
= alloca (namelength
+ 1);
2712 /* psymbol is static so that there will be no uninitialized gaps in the
2713 structure which might contain random data, causing cache misses in
2715 static struct partial_symbol psymbol
;
2717 /* Create local copy of the partial symbol */
2719 memcpy (buf
, name
, namelength
);
2720 buf
[namelength
] = '\0';
2721 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2722 objfile
->psymbol_cache
);
2724 buf
= alloca (dem_namelength
+ 1);
2725 memcpy (buf
, dem_name
, dem_namelength
);
2726 buf
[dem_namelength
] = '\0';
2731 case language_cplus
:
2732 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2733 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2735 /* FIXME What should be done for the default case? Ignoring for now. */
2738 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2741 SYMBOL_VALUE (&psymbol
) = val
;
2745 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2747 SYMBOL_SECTION (&psymbol
) = 0;
2748 SYMBOL_LANGUAGE (&psymbol
) = language
;
2749 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2750 PSYMBOL_CLASS (&psymbol
) = class;
2751 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2753 /* Stash the partial symbol away in the cache */
2754 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2755 objfile
->psymbol_cache
);
2757 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2758 if (list
->next
>= list
->list
+ list
->size
)
2760 extend_psymbol_list (list
, objfile
);
2762 *list
->next
++ = psym
;
2763 OBJSTAT (objfile
, n_psyms
++);
2766 /* Initialize storage for partial symbols. */
2769 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2771 /* Free any previously allocated psymbol lists. */
2773 if (objfile
->global_psymbols
.list
)
2775 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2777 if (objfile
->static_psymbols
.list
)
2779 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2782 /* Current best guess is that approximately a twentieth
2783 of the total symbols (in a debugging file) are global or static
2786 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2787 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2789 if (objfile
->global_psymbols
.size
> 0)
2791 objfile
->global_psymbols
.next
=
2792 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2793 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2794 * sizeof (struct partial_symbol
*)));
2796 if (objfile
->static_psymbols
.size
> 0)
2798 objfile
->static_psymbols
.next
=
2799 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2800 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2801 * sizeof (struct partial_symbol
*)));
2806 The following code implements an abstraction for debugging overlay sections.
2808 The target model is as follows:
2809 1) The gnu linker will permit multiple sections to be mapped into the
2810 same VMA, each with its own unique LMA (or load address).
2811 2) It is assumed that some runtime mechanism exists for mapping the
2812 sections, one by one, from the load address into the VMA address.
2813 3) This code provides a mechanism for gdb to keep track of which
2814 sections should be considered to be mapped from the VMA to the LMA.
2815 This information is used for symbol lookup, and memory read/write.
2816 For instance, if a section has been mapped then its contents
2817 should be read from the VMA, otherwise from the LMA.
2819 Two levels of debugger support for overlays are available. One is
2820 "manual", in which the debugger relies on the user to tell it which
2821 overlays are currently mapped. This level of support is
2822 implemented entirely in the core debugger, and the information about
2823 whether a section is mapped is kept in the objfile->obj_section table.
2825 The second level of support is "automatic", and is only available if
2826 the target-specific code provides functionality to read the target's
2827 overlay mapping table, and translate its contents for the debugger
2828 (by updating the mapped state information in the obj_section tables).
2830 The interface is as follows:
2832 overlay map <name> -- tell gdb to consider this section mapped
2833 overlay unmap <name> -- tell gdb to consider this section unmapped
2834 overlay list -- list the sections that GDB thinks are mapped
2835 overlay read-target -- get the target's state of what's mapped
2836 overlay off/manual/auto -- set overlay debugging state
2837 Functional interface:
2838 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2839 section, return that section.
2840 find_pc_overlay(pc): find any overlay section that contains
2841 the pc, either in its VMA or its LMA
2842 overlay_is_mapped(sect): true if overlay is marked as mapped
2843 section_is_overlay(sect): true if section's VMA != LMA
2844 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2845 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2846 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2847 overlay_mapped_address(...): map an address from section's LMA to VMA
2848 overlay_unmapped_address(...): map an address from section's VMA to LMA
2849 symbol_overlayed_address(...): Return a "current" address for symbol:
2850 either in VMA or LMA depending on whether
2851 the symbol's section is currently mapped
2854 /* Overlay debugging state: */
2856 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2857 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2859 /* Target vector for refreshing overlay mapped state */
2860 static void simple_overlay_update (struct obj_section
*);
2861 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2863 /* Function: section_is_overlay (SECTION)
2864 Returns true if SECTION has VMA not equal to LMA, ie.
2865 SECTION is loaded at an address different from where it will "run". */
2868 section_is_overlay (asection
*section
)
2870 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2872 if (overlay_debugging
)
2873 if (section
&& section
->lma
!= 0 &&
2874 section
->vma
!= section
->lma
)
2880 /* Function: overlay_invalidate_all (void)
2881 Invalidate the mapped state of all overlay sections (mark it as stale). */
2884 overlay_invalidate_all (void)
2886 struct objfile
*objfile
;
2887 struct obj_section
*sect
;
2889 ALL_OBJSECTIONS (objfile
, sect
)
2890 if (section_is_overlay (sect
->the_bfd_section
))
2891 sect
->ovly_mapped
= -1;
2894 /* Function: overlay_is_mapped (SECTION)
2895 Returns true if section is an overlay, and is currently mapped.
2896 Private: public access is thru function section_is_mapped.
2898 Access to the ovly_mapped flag is restricted to this function, so
2899 that we can do automatic update. If the global flag
2900 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2901 overlay_invalidate_all. If the mapped state of the particular
2902 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2905 overlay_is_mapped (struct obj_section
*osect
)
2907 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2910 switch (overlay_debugging
)
2914 return 0; /* overlay debugging off */
2915 case ovly_auto
: /* overlay debugging automatic */
2916 /* Unles there is a target_overlay_update function,
2917 there's really nothing useful to do here (can't really go auto) */
2918 if (target_overlay_update
)
2920 if (overlay_cache_invalid
)
2922 overlay_invalidate_all ();
2923 overlay_cache_invalid
= 0;
2925 if (osect
->ovly_mapped
== -1)
2926 (*target_overlay_update
) (osect
);
2928 /* fall thru to manual case */
2929 case ovly_on
: /* overlay debugging manual */
2930 return osect
->ovly_mapped
== 1;
2934 /* Function: section_is_mapped
2935 Returns true if section is an overlay, and is currently mapped. */
2938 section_is_mapped (asection
*section
)
2940 struct objfile
*objfile
;
2941 struct obj_section
*osect
;
2943 if (overlay_debugging
)
2944 if (section
&& section_is_overlay (section
))
2945 ALL_OBJSECTIONS (objfile
, osect
)
2946 if (osect
->the_bfd_section
== section
)
2947 return overlay_is_mapped (osect
);
2952 /* Function: pc_in_unmapped_range
2953 If PC falls into the lma range of SECTION, return true, else false. */
2956 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2958 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2962 if (overlay_debugging
)
2963 if (section
&& section_is_overlay (section
))
2965 size
= bfd_get_section_size_before_reloc (section
);
2966 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2972 /* Function: pc_in_mapped_range
2973 If PC falls into the vma range of SECTION, return true, else false. */
2976 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2978 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2982 if (overlay_debugging
)
2983 if (section
&& section_is_overlay (section
))
2985 size
= bfd_get_section_size_before_reloc (section
);
2986 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2993 /* Return true if the mapped ranges of sections A and B overlap, false
2996 sections_overlap (asection
*a
, asection
*b
)
2998 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3000 CORE_ADDR a_start
= a
->vma
;
3001 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
3002 CORE_ADDR b_start
= b
->vma
;
3003 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
3005 return (a_start
< b_end
&& b_start
< a_end
);
3008 /* Function: overlay_unmapped_address (PC, SECTION)
3009 Returns the address corresponding to PC in the unmapped (load) range.
3010 May be the same as PC. */
3013 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3015 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3017 if (overlay_debugging
)
3018 if (section
&& section_is_overlay (section
) &&
3019 pc_in_mapped_range (pc
, section
))
3020 return pc
+ section
->lma
- section
->vma
;
3025 /* Function: overlay_mapped_address (PC, SECTION)
3026 Returns the address corresponding to PC in the mapped (runtime) range.
3027 May be the same as PC. */
3030 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3032 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3034 if (overlay_debugging
)
3035 if (section
&& section_is_overlay (section
) &&
3036 pc_in_unmapped_range (pc
, section
))
3037 return pc
+ section
->vma
- section
->lma
;
3043 /* Function: symbol_overlayed_address
3044 Return one of two addresses (relative to the VMA or to the LMA),
3045 depending on whether the section is mapped or not. */
3048 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3050 if (overlay_debugging
)
3052 /* If the symbol has no section, just return its regular address. */
3055 /* If the symbol's section is not an overlay, just return its address */
3056 if (!section_is_overlay (section
))
3058 /* If the symbol's section is mapped, just return its address */
3059 if (section_is_mapped (section
))
3062 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3063 * then return its LOADED address rather than its vma address!!
3065 return overlay_unmapped_address (address
, section
);
3070 /* Function: find_pc_overlay (PC)
3071 Return the best-match overlay section for PC:
3072 If PC matches a mapped overlay section's VMA, return that section.
3073 Else if PC matches an unmapped section's VMA, return that section.
3074 Else if PC matches an unmapped section's LMA, return that section. */
3077 find_pc_overlay (CORE_ADDR pc
)
3079 struct objfile
*objfile
;
3080 struct obj_section
*osect
, *best_match
= NULL
;
3082 if (overlay_debugging
)
3083 ALL_OBJSECTIONS (objfile
, osect
)
3084 if (section_is_overlay (osect
->the_bfd_section
))
3086 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3088 if (overlay_is_mapped (osect
))
3089 return osect
->the_bfd_section
;
3093 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3096 return best_match
? best_match
->the_bfd_section
: NULL
;
3099 /* Function: find_pc_mapped_section (PC)
3100 If PC falls into the VMA address range of an overlay section that is
3101 currently marked as MAPPED, return that section. Else return NULL. */
3104 find_pc_mapped_section (CORE_ADDR pc
)
3106 struct objfile
*objfile
;
3107 struct obj_section
*osect
;
3109 if (overlay_debugging
)
3110 ALL_OBJSECTIONS (objfile
, osect
)
3111 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3112 overlay_is_mapped (osect
))
3113 return osect
->the_bfd_section
;
3118 /* Function: list_overlays_command
3119 Print a list of mapped sections and their PC ranges */
3122 list_overlays_command (char *args
, int from_tty
)
3125 struct objfile
*objfile
;
3126 struct obj_section
*osect
;
3128 if (overlay_debugging
)
3129 ALL_OBJSECTIONS (objfile
, osect
)
3130 if (overlay_is_mapped (osect
))
3136 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3137 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3138 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3139 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3141 printf_filtered ("Section %s, loaded at ", name
);
3142 print_address_numeric (lma
, 1, gdb_stdout
);
3143 puts_filtered (" - ");
3144 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3145 printf_filtered (", mapped at ");
3146 print_address_numeric (vma
, 1, gdb_stdout
);
3147 puts_filtered (" - ");
3148 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3149 puts_filtered ("\n");
3154 printf_filtered ("No sections are mapped.\n");
3157 /* Function: map_overlay_command
3158 Mark the named section as mapped (ie. residing at its VMA address). */
3161 map_overlay_command (char *args
, int from_tty
)
3163 struct objfile
*objfile
, *objfile2
;
3164 struct obj_section
*sec
, *sec2
;
3167 if (!overlay_debugging
)
3169 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3170 the 'overlay manual' command.");
3172 if (args
== 0 || *args
== 0)
3173 error ("Argument required: name of an overlay section");
3175 /* First, find a section matching the user supplied argument */
3176 ALL_OBJSECTIONS (objfile
, sec
)
3177 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3179 /* Now, check to see if the section is an overlay. */
3180 bfdsec
= sec
->the_bfd_section
;
3181 if (!section_is_overlay (bfdsec
))
3182 continue; /* not an overlay section */
3184 /* Mark the overlay as "mapped" */
3185 sec
->ovly_mapped
= 1;
3187 /* Next, make a pass and unmap any sections that are
3188 overlapped by this new section: */
3189 ALL_OBJSECTIONS (objfile2
, sec2
)
3190 if (sec2
->ovly_mapped
3192 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3193 && sections_overlap (sec
->the_bfd_section
,
3194 sec2
->the_bfd_section
))
3197 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3198 bfd_section_name (objfile
->obfd
,
3199 sec2
->the_bfd_section
));
3200 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3204 error ("No overlay section called %s", args
);
3207 /* Function: unmap_overlay_command
3208 Mark the overlay section as unmapped
3209 (ie. resident in its LMA address range, rather than the VMA range). */
3212 unmap_overlay_command (char *args
, int from_tty
)
3214 struct objfile
*objfile
;
3215 struct obj_section
*sec
;
3217 if (!overlay_debugging
)
3219 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3220 the 'overlay manual' command.");
3222 if (args
== 0 || *args
== 0)
3223 error ("Argument required: name of an overlay section");
3225 /* First, find a section matching the user supplied argument */
3226 ALL_OBJSECTIONS (objfile
, sec
)
3227 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3229 if (!sec
->ovly_mapped
)
3230 error ("Section %s is not mapped", args
);
3231 sec
->ovly_mapped
= 0;
3234 error ("No overlay section called %s", args
);
3237 /* Function: overlay_auto_command
3238 A utility command to turn on overlay debugging.
3239 Possibly this should be done via a set/show command. */
3242 overlay_auto_command (char *args
, int from_tty
)
3244 overlay_debugging
= ovly_auto
;
3245 enable_overlay_breakpoints ();
3247 printf_unfiltered ("Automatic overlay debugging enabled.");
3250 /* Function: overlay_manual_command
3251 A utility command to turn on overlay debugging.
3252 Possibly this should be done via a set/show command. */
3255 overlay_manual_command (char *args
, int from_tty
)
3257 overlay_debugging
= ovly_on
;
3258 disable_overlay_breakpoints ();
3260 printf_unfiltered ("Overlay debugging enabled.");
3263 /* Function: overlay_off_command
3264 A utility command to turn on overlay debugging.
3265 Possibly this should be done via a set/show command. */
3268 overlay_off_command (char *args
, int from_tty
)
3270 overlay_debugging
= ovly_off
;
3271 disable_overlay_breakpoints ();
3273 printf_unfiltered ("Overlay debugging disabled.");
3277 overlay_load_command (char *args
, int from_tty
)
3279 if (target_overlay_update
)
3280 (*target_overlay_update
) (NULL
);
3282 error ("This target does not know how to read its overlay state.");
3285 /* Function: overlay_command
3286 A place-holder for a mis-typed command */
3288 /* Command list chain containing all defined "overlay" subcommands. */
3289 struct cmd_list_element
*overlaylist
;
3292 overlay_command (char *args
, int from_tty
)
3295 ("\"overlay\" must be followed by the name of an overlay command.\n");
3296 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3300 /* Target Overlays for the "Simplest" overlay manager:
3302 This is GDB's default target overlay layer. It works with the
3303 minimal overlay manager supplied as an example by Cygnus. The
3304 entry point is via a function pointer "target_overlay_update",
3305 so targets that use a different runtime overlay manager can
3306 substitute their own overlay_update function and take over the
3309 The overlay_update function pokes around in the target's data structures
3310 to see what overlays are mapped, and updates GDB's overlay mapping with
3313 In this simple implementation, the target data structures are as follows:
3314 unsigned _novlys; /# number of overlay sections #/
3315 unsigned _ovly_table[_novlys][4] = {
3316 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3317 {..., ..., ..., ...},
3319 unsigned _novly_regions; /# number of overlay regions #/
3320 unsigned _ovly_region_table[_novly_regions][3] = {
3321 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3324 These functions will attempt to update GDB's mappedness state in the
3325 symbol section table, based on the target's mappedness state.
3327 To do this, we keep a cached copy of the target's _ovly_table, and
3328 attempt to detect when the cached copy is invalidated. The main
3329 entry point is "simple_overlay_update(SECT), which looks up SECT in
3330 the cached table and re-reads only the entry for that section from
3331 the target (whenever possible).
3334 /* Cached, dynamically allocated copies of the target data structures: */
3335 static unsigned (*cache_ovly_table
)[4] = 0;
3337 static unsigned (*cache_ovly_region_table
)[3] = 0;
3339 static unsigned cache_novlys
= 0;
3341 static unsigned cache_novly_regions
= 0;
3343 static CORE_ADDR cache_ovly_table_base
= 0;
3345 static CORE_ADDR cache_ovly_region_table_base
= 0;
3349 VMA
, SIZE
, LMA
, MAPPED
3351 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3353 /* Throw away the cached copy of _ovly_table */
3355 simple_free_overlay_table (void)
3357 if (cache_ovly_table
)
3358 xfree (cache_ovly_table
);
3360 cache_ovly_table
= NULL
;
3361 cache_ovly_table_base
= 0;
3365 /* Throw away the cached copy of _ovly_region_table */
3367 simple_free_overlay_region_table (void)
3369 if (cache_ovly_region_table
)
3370 xfree (cache_ovly_region_table
);
3371 cache_novly_regions
= 0;
3372 cache_ovly_region_table
= NULL
;
3373 cache_ovly_region_table_base
= 0;
3377 /* Read an array of ints from the target into a local buffer.
3378 Convert to host order. int LEN is number of ints */
3380 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3382 /* FIXME (alloca): Not safe if array is very large. */
3383 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3386 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3387 for (i
= 0; i
< len
; i
++)
3388 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3392 /* Find and grab a copy of the target _ovly_table
3393 (and _novlys, which is needed for the table's size) */
3395 simple_read_overlay_table (void)
3397 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3399 simple_free_overlay_table ();
3400 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3403 error ("Error reading inferior's overlay table: "
3404 "couldn't find `_novlys' variable\n"
3405 "in inferior. Use `overlay manual' mode.");
3409 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3410 if (! ovly_table_msym
)
3412 error ("Error reading inferior's overlay table: couldn't find "
3413 "`_ovly_table' array\n"
3414 "in inferior. Use `overlay manual' mode.");
3418 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3420 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3421 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3422 read_target_long_array (cache_ovly_table_base
,
3423 (int *) cache_ovly_table
,
3426 return 1; /* SUCCESS */
3430 /* Find and grab a copy of the target _ovly_region_table
3431 (and _novly_regions, which is needed for the table's size) */
3433 simple_read_overlay_region_table (void)
3435 struct minimal_symbol
*msym
;
3437 simple_free_overlay_region_table ();
3438 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3440 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3442 return 0; /* failure */
3443 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3444 if (cache_ovly_region_table
!= NULL
)
3446 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3449 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3450 read_target_long_array (cache_ovly_region_table_base
,
3451 (int *) cache_ovly_region_table
,
3452 cache_novly_regions
* 3);
3455 return 0; /* failure */
3458 return 0; /* failure */
3459 return 1; /* SUCCESS */
3463 /* Function: simple_overlay_update_1
3464 A helper function for simple_overlay_update. Assuming a cached copy
3465 of _ovly_table exists, look through it to find an entry whose vma,
3466 lma and size match those of OSECT. Re-read the entry and make sure
3467 it still matches OSECT (else the table may no longer be valid).
3468 Set OSECT's mapped state to match the entry. Return: 1 for
3469 success, 0 for failure. */
3472 simple_overlay_update_1 (struct obj_section
*osect
)
3475 bfd
*obfd
= osect
->objfile
->obfd
;
3476 asection
*bsect
= osect
->the_bfd_section
;
3478 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3479 for (i
= 0; i
< cache_novlys
; i
++)
3480 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3481 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3482 /* && cache_ovly_table[i][SIZE] == size */ )
3484 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3485 (int *) cache_ovly_table
[i
], 4);
3486 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3487 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3488 /* && cache_ovly_table[i][SIZE] == size */ )
3490 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3493 else /* Warning! Warning! Target's ovly table has changed! */
3499 /* Function: simple_overlay_update
3500 If OSECT is NULL, then update all sections' mapped state
3501 (after re-reading the entire target _ovly_table).
3502 If OSECT is non-NULL, then try to find a matching entry in the
3503 cached ovly_table and update only OSECT's mapped state.
3504 If a cached entry can't be found or the cache isn't valid, then
3505 re-read the entire cache, and go ahead and update all sections. */
3508 simple_overlay_update (struct obj_section
*osect
)
3510 struct objfile
*objfile
;
3512 /* Were we given an osect to look up? NULL means do all of them. */
3514 /* Have we got a cached copy of the target's overlay table? */
3515 if (cache_ovly_table
!= NULL
)
3516 /* Does its cached location match what's currently in the symtab? */
3517 if (cache_ovly_table_base
==
3518 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3519 /* Then go ahead and try to look up this single section in the cache */
3520 if (simple_overlay_update_1 (osect
))
3521 /* Found it! We're done. */
3524 /* Cached table no good: need to read the entire table anew.
3525 Or else we want all the sections, in which case it's actually
3526 more efficient to read the whole table in one block anyway. */
3528 if (! simple_read_overlay_table ())
3531 /* Now may as well update all sections, even if only one was requested. */
3532 ALL_OBJSECTIONS (objfile
, osect
)
3533 if (section_is_overlay (osect
->the_bfd_section
))
3536 bfd
*obfd
= osect
->objfile
->obfd
;
3537 asection
*bsect
= osect
->the_bfd_section
;
3539 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3540 for (i
= 0; i
< cache_novlys
; i
++)
3541 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3542 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3543 /* && cache_ovly_table[i][SIZE] == size */ )
3544 { /* obj_section matches i'th entry in ovly_table */
3545 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3546 break; /* finished with inner for loop: break out */
3551 /* Set the output sections and output offsets for section SECTP in
3552 ABFD. The relocation code in BFD will read these offsets, so we
3553 need to be sure they're initialized. We map each section to itself,
3554 with no offset; this means that SECTP->vma will be honored. */
3557 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3559 sectp
->output_section
= sectp
;
3560 sectp
->output_offset
= 0;
3563 /* Relocate the contents of a debug section SECTP in ABFD. The
3564 contents are stored in BUF if it is non-NULL, or returned in a
3565 malloc'd buffer otherwise.
3567 For some platforms and debug info formats, shared libraries contain
3568 relocations against the debug sections (particularly for DWARF-2;
3569 one affected platform is PowerPC GNU/Linux, although it depends on
3570 the version of the linker in use). Also, ELF object files naturally
3571 have unresolved relocations for their debug sections. We need to apply
3572 the relocations in order to get the locations of symbols correct. */
3575 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3577 /* We're only interested in debugging sections with relocation
3579 if ((sectp
->flags
& SEC_RELOC
) == 0)
3581 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3584 /* We will handle section offsets properly elsewhere, so relocate as if
3585 all sections begin at 0. */
3586 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3588 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3592 _initialize_symfile (void)
3594 struct cmd_list_element
*c
;
3596 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3597 "Load symbol table from executable file FILE.\n\
3598 The `file' command can also load symbol tables, as well as setting the file\n\
3599 to execute.", &cmdlist
);
3600 set_cmd_completer (c
, filename_completer
);
3602 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3603 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3604 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3605 ADDR is the starting address of the file's text.\n\
3606 The optional arguments are section-name section-address pairs and\n\
3607 should be specified if the data and bss segments are not contiguous\n\
3608 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3610 set_cmd_completer (c
, filename_completer
);
3612 c
= add_cmd ("add-shared-symbol-files", class_files
,
3613 add_shared_symbol_files_command
,
3614 "Load the symbols from shared objects in the dynamic linker's link map.",
3616 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3619 c
= add_cmd ("load", class_files
, load_command
,
3620 "Dynamically load FILE into the running program, and record its symbols\n\
3621 for access from GDB.", &cmdlist
);
3622 set_cmd_completer (c
, filename_completer
);
3625 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3626 (char *) &symbol_reloading
,
3627 "Set dynamic symbol table reloading multiple times in one run.",
3631 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3632 "Commands for debugging overlays.", &overlaylist
,
3633 "overlay ", 0, &cmdlist
);
3635 add_com_alias ("ovly", "overlay", class_alias
, 1);
3636 add_com_alias ("ov", "overlay", class_alias
, 1);
3638 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3639 "Assert that an overlay section is mapped.", &overlaylist
);
3641 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3642 "Assert that an overlay section is unmapped.", &overlaylist
);
3644 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3645 "List mappings of overlay sections.", &overlaylist
);
3647 add_cmd ("manual", class_support
, overlay_manual_command
,
3648 "Enable overlay debugging.", &overlaylist
);
3649 add_cmd ("off", class_support
, overlay_off_command
,
3650 "Disable overlay debugging.", &overlaylist
);
3651 add_cmd ("auto", class_support
, overlay_auto_command
,
3652 "Enable automatic overlay debugging.", &overlaylist
);
3653 add_cmd ("load-target", class_support
, overlay_load_command
,
3654 "Read the overlay mapping state from the target.", &overlaylist
);
3656 /* Filename extension to source language lookup table: */
3657 init_filename_language_table ();
3658 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3660 "Set mapping between filename extension and source language.\n\
3661 Usage: set extension-language .foo bar",
3663 set_cmd_cfunc (c
, set_ext_lang_command
);
3665 add_info ("extensions", info_ext_lang_command
,
3666 "All filename extensions associated with a source language.");
3669 (add_set_cmd ("download-write-size", class_obscure
,
3670 var_integer
, (char *) &download_write_size
,
3671 "Set the write size used when downloading a program.\n"
3672 "Only used when downloading a program onto a remote\n"
3673 "target. Specify zero, or a negative value, to disable\n"
3674 "blocked writes. The actual size of each transfer is also\n"
3675 "limited by the size of the target packet and the memory\n"
3680 debug_file_directory
= xstrdup (DEBUGDIR
);
3682 ("debug-file-directory", class_support
, var_string
,
3683 (char *) &debug_file_directory
,
3684 "Set the directory where separate debug symbols are searched for.\n"
3685 "Separate debug symbols are first searched for in the same\n"
3686 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3688 "and lastly at the path of the directory of the binary with\n"
3689 "the global debug-file directory prepended\n",
3691 add_show_from_set (c
, &showlist
);
3692 set_cmd_completer (c
, filename_completer
);